The use of water-reducing agents has become more and more widespread. In actual production, water-reducing agents are basically used in all the buildings we live in, and construction workers are often in contact with water-reducing agents. So is the water-reducing agent used in construction harmful to the human body? Many people do not know it clearly.
1. Water-reducing agents can be divided into chemicals. The main components are ammonia, radon and radium. When it comes to chemicals, they are somewhat harmful to the body, but radon and radium mainly come from construction. Some concrete and some natural stone among construction materials.
2. Admixtures containing ammonia are reduced to ammonia gas in the wall as environmental factors such as humidity and temperature change, and are slowly released from the wall. Therefore, in newly completed buildings, it is necessary to The air circulates, and it takes a while before you can live in it.
3. Although these elements are harmful to the human body, as long as we do not let them directly enter the body during use, there will be no problem, and now the water-reducing agent is constantly being improved, basically They have also reached the level of non-toxic and environmentally friendly.
How to use:
1. Dosage
The amount of cementitious material is 6-8%, and for large amounts of post-filling pouring belts or expansion reinforcement belts, Expansive concrete, the dosage is 10-12%.
2. Mixing and construction
When mixing concrete, it is necessary to weigh accurately, add materials in accordance with the order of feeding, and mix evenly. Concrete can be continuously poured and vibrated to ensure that it is uniform and dense. .
3. Maintenance
After the concrete hardens, it needs to be watered and cured immediately. The curing time should not be less than 14 days.
Application fields:
Widely used in concrete mixing stations, compounding plants, bridge projects, concrete sleepers, bases and caps, etc.
After water-reducing agent is mixed into concrete, the hydrophobic groups of the water-reducing agent are directionally adsorbed on the surface of the cement particles, while the hydrophilic groups are directed toward the aqueous solution, forming a single-molecule or multi-layer adsorption film. Due to the directional adsorption of the surfactant, the surface of the cement particles has charges of the same sign. Therefore, under the action of same-sex repulsion, not only can the cement-water system be in a relatively stable suspended state, but also the cement can be added with water. The flocculated structure formed in the initial stage is dispersed and disintegrated, thereby releasing the water in the flocculated structure to achieve the purpose of water reduction. After the water-reducing agent is added, not only can the workability of fresh concrete be improved, but also because the water-cement ratio in the concrete has dropped significantly, the internal pore volume of the cement stone has been significantly reduced, the cement stone has become denser, and the resistance of the concrete has increased. The compressive strength is significantly improved.
About whether the water-reducing agent used in construction is harmful to the human body, I will share it here. As long as we follow the instructions and precautions for using the water-reducing agent, there is no need to worry. It is not harmful to our bodies. What impact.
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